问题描述
我需要知道如何修复这些错误说明:
I need to know how to fix these error notes:
Note: Summer.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
这是我的代码:
import java.util.Calendar;
import java.util.*;
class Summer
{
public static void main(String[] args)
{
Date d1 = new Date();
Date j21 = new Date(d1.getYear(), 6, 21);
if(d1.before(j21)) {
long diff = j21.getTime() - d1.getTime();
diff = diff / (1000 * 60 * 60 * 24);
System.out.println("There are " + diff + " days until June 21st" );
}
else {
long diff = d1.getTime() - j21.getTime();
diff = diff / (1000 * 60 * 60 * 24);
diff = 365 - diff;
System.out.println("There are " + diff + " days until June 21st" );
}
}
}
推荐答案
这不是错误,它是一条警告信息。
This is not an error , its a warning message.
您的程序将在您编写时运行。
Your program would run as you wrote it.
编译器为您提供此警告的原因是您使用了已弃用的函数调用。
the reason why the compiler is giving you this warning is because you have used a deprecated function call.
通过使用-Xlint重新编译,编译器意味着通知您需要重新编译程序
by recompile with -Xlint , compiler means to inform you that you need to recompile your program as
javac -Xlint abc.java
如果你这样做,编译器会告诉你哪些方法已弃用,所以你可以删除它们。
if you do so, the compiler will tell which methods are deprecated so you could remove those.
基本上如果某种方法被弃用,则会提供更好的实现,因此编译器会弹出警告,通知您已尝试使用更好的内容
"basically if some method is deprecated, a better implementation is provided" so the complier pops up a warning informing that something better has been provided for what you are trying to use"
PS:建议不要使用弃用的方法。
PS: it is always advisable not to use deprecated methods.
希望有所帮助: - )
Hope it helps :-)
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